Power reverse-gear.



J. R. SNYDER.

POWER REVERSE GEAR. APELICATION FILED MAR. 26. 1911.

Patented Jan. 7, 1919.

3 SHEETS-SHEET 1- WITNESSES J. R. SNYDER. POWER REVERSE GEAR. APPLICATION FILED MAR. 26. I917.

Patented J #11. 7, 191

3 SHEETSSHEET 2.

J. R. SNYDER. POWER REVERSE GEAR. v 7 APPLICATION FIL ED MAR. 26. 1917.

1,290,389.. Patented Jan. 7,1919.

. 3 SHEETS-TSHEET 3-. FIG 6 65 72 7' nae s PATENT OFFICE.

.mooniansn SNYDER, or PITTSBURGH, rENNsYLvANIA, ASSIGNOB To PERCY E.

- moNNEa, or PITTSBURGH, PENNSYLVANIA. Y

, naaaaea.

Application flled March 2c, 1917. Seria1No.;1'57,422.

To all whom it may concern:

Be it known that I, J AGOB Rosa SNYDER, a citizen of the UnitedStates, and resident of Pittsburgh, in the county of'Allegheny r and State Pennsylvania, have invented a new and useful Improvement in Power Beverse-Gears, of which the following is a specification.

The invention relates to valve reversing mechanism for steam engines and the like, particularly for steam locomotives.

' When valve reversing mechanisms for .10-

com-otives are power-operated, 'it is importo the engine itself.

The present invention has been devised to overcome this dificulty. The fluid pressure motor 'for operating the valve reversing mechanism is arranged so that" when in neutral position both ends of the cylinder'are exhausted. Consequently there is no tendeney for the valvereversing gear to move when the valve mechanismcontrolling the same is in neutral position, as there would be in case fluid pressure were trapped in one end of the cylinder. In addition, a fluid pressure lock is provided which positively locks the valve reversing mechanism when in neutral position. .ThiS fluid pressure lock may be operated by compressed air from the main. reservoir of the air brake system of the train, which reservoir is generally located on the engine. When the engine is placed in a round-house, however, a supply of compressed air is often not malntalned so that fluid pressure for' operating the. lock not readily or conveniently available. It 1s desirable, nevertheless, to have the lock positively operated so as to provide what mi ht be termed a night-latch for positively lock ng the valve reversing gear in neutral position.

During the time that the-engine is in the f round-house, steam is generally maintained in the boiler thereof, and in thepresent 1n- ,rowEa nEvEns -eEaE; 1

Specification of Letters Patent.

Patented Jan. 7, i919.

vention this steam' pressure is employed to operate the fluid pressurelock to provide a night-latch for the valvereversin gear;

One of the objects of the invention is to provide an improved power-operated valve.

reversing mechanism inlwhich'the locking means is actuated'by steam from the ,loco motive boiler.

A further object is to provide an improved valve mechanism for controlling the motive fl l11d' supply to the valve reversing mechanism. Other objects and vadvanta esof the in- .vention will appearin the to lowing specification. a

An embodiment of the inventionis illus trated in the accompanyingdrawings. The

views of the drawings are as follows:

Figure 1 is an elevation and partial cross section of the valve reversing mechanism as applied to a locomotive.-

. Fig. 2 is a cross section of a drip valve from the steam-operated reversing mechan sm.

Fig. 3 is a front elevation ofthe mechanism for operating the rotary valve which controls the motive fluid supply to the power cylinder, which operates the valve reversing Flg. 4 1s a cross section of the mechanism shown in, Fig. Sand of the rotary" vai've mechanisms Fig. 5 is a cross section of the steam pressure operated lock, said view also showing one end of the power cylinder which operatesthe valvereversing gear.

Fig. 6 is a planv view of the graduating rotary member of the valvular mechanism for controlling the motive fluid supply to the power cylinder.

mem r of the valvular mechanism.

lock for the valve Fig. 7 is a plan view ofthe main rotary e Fig. 8 is a plan view of the valve seat o the valvular mechanism.

Fig. 9 illustrates the relative positions of the ,rotaries and the valve seatjwhen the valvular mechanism is. in neutral position.

Fig.10 i1lustrates the relative positions of the rotaries and the valve seat the valvular mechanism has beenmoved to unlock the lockingmeans and admit motive fluid to one end of the power cylinder.

Fig. 11 illustrates the relative positions" of the rotaries and the valve seat. whenthe valvular mechanism has been moved to fully lock 2 forlocking said mechanism, a valve open the inder.

Fig. 12 illustrates the relative positions of the rotaries and the valve seat when the valvular mechanism has been moved inthe port to one end of the power cylopposite direction to unlock the locking means and admit motive fluid to the opposite end of the cylinder. This position is the reverse of that shown in Fig. 10.

Fig. 13 is a cross section of the valve rotaries and of the valve seat taken on the line 13'13 of Fig. 9.

The mechanism. comprises in general "a fluid pressure motor v1 for operating the valve reversing mechanism, ,a fluid premre mechanism 3 for controlling the motive supply of fluid to the locking means, a'fluidpressure motor 4 for operating the valve 3, valvular mechanism 5 for controlling the motive fluid supply to both the fluid pressure -motors 1 and 4, and operating mechanism 6 for actuating the valvular mechanism 5.

The fluid pressure motor illustrated comprises a cylinder having a piston 7 therein connected bya piston rod 8' to a cross head 9 to which is attached a reach rod or link lo vconnectedto the usual link mechanism of the valves of a locomotive, not shown. When the link mechanism of the locomotive is in neutral position the piston 7 is stationed midway of the length of the cylinder, :as shown in Fig. 1. In order-to drive the.

engine forwardly, the reach rod 10 is moved to the right, viewed in Fig.1, by ad'mitting pressure to the left-hand end of the cylinder'through the pipe 11, and to reverse the engine the rod 10 is moved toward the left, viewed in Fig. 1, by admitting fluid pressure into the right-hand end of the cylinder through the pipe 12.

The fluid pressure lock 2 is illustrated[ more particularly in Fig. 5. It comprises a member 13 engaging one side of the piston rod 8 and a pivoted .clamping member 14 for gripping the, opposite side of said rod. The pivoted member 14 is actuated to grip the rod by means of a movable abutment, such as the diaphragm 15, in a small power cylinder 16, said abutment carrying a projection 17 contacting with the end ofan adjustable screw 18. carried by the outer end of the movable member 14. Steam pressure can be admitted to and exhausted from the cylinder 16 through the pipe 19. When pressure is admitted into said cylinder the rod to be forcibly moved without breaking any of the parts as would be the case with toothed and similar mechanical looks. The lock willlock the-rod 8 in any position of the latter and does not require that the rod be in a certain position with a notch therein or a. projection thereon registering with complementary projections or notches on the locklng means. The force with which the lock grips the rod may be varied by adjusting the bolt 18 and said bolt may be adjusted to compensate for all wear on the gripping surface. The motive fluid -for actuating the lock is in this mechanism preferably steam, though of course other fluids might be used. When steam is used to operate the lock, provision is made to automatically drain the water of condensationffrom the lock cylinder without opening the latter to the atmosphere. For thispurpose a pipe 21, shown in Fig. 1, connects the cylinder chamber 16 to a water trap 22, shown in Fig. 2, in which trap the, water accumulates until the float 23 is lifted sufliciently to open the discharge valve 24, whereupon a portion of the water is discharged from the'trap, but as soon as the water level in the trap sinks to a predetermined level the valve 24 closes, so that at all times a water seal ismaintained, and the cylinder never open to the atmosphere. Other suitable draining means may be ememployed, if desired.

The valve" mechanism 3 for controlling the steam supply to the locking means 2 comprises a suitable three-way valve having an outer casing 25 and an inner rotary member 26 actuated by a lever 27. A pipe 28 communicating with {the steam supply and the pipe 19 communicating with the cylinder of the lock 2 are connected to the valve. The valve casing has an exhaust port 29 which in one position of the rotary member 26 is connected by the recess 30 therein with the pipe 19 to exhaust the cylinder of the lock, whereas in the position of the valve illustrated, the recess 30 connects the pipe 19 with the pipe 28 to the steam sup 1y, so that iull steam pressure is admitted to the lock. When the arm 27 is moved to the right, viewed Fig. 1 communication between the pipes 19 and 28 is cut off, and in the extreme right-hand position of the lever 27 the pipe 19 is connected to the exhaust port 29 to vent. the

V to atmosphere.

The valve 3 is controlled by the fluid pressure motor 4 which comprises a cylinder 31' pressure from the lock having a piston 32therein, the piston rod 33 of which is connected to the lever 27 by a pin and slot connection; The piston 32.is

to maintain steam pressure in the lock and hold the reversing mechanism in position.

In order to release the lock 2, fluid pressure is admitted to the left-hand endof cylinder 31 through the pipe 35, which causes the piston 32 to move to the right, thereby operating valve 3 to cut ofi the steam supply and connect the pipe'19 with the ex?- haust port 29 to exhaust motive fluid from the lock 2 to unlock the same.

The valvular mechanism 5, which will behereinafter described in more detail, controls the motive fluid supply to the pipes 11 and 12 connected to the respective ends of the fluid motor 1 and also to the pipe 35 connected to the/ motor 4. When the valvular mechanism 5 is actuated to move the reversing gear, fluid pressure is admitted to the pipe 35 to cause the piston 32 to move to the right and exhaust steam from the lock 2, thereby unlocking the mechanism. Simultaneously with this action or slightly subsequent thereto, fluid pressure is admitted to one end of the'cylinder 1, there- 'by causing the reversing mechanism to move.

The valve mechanism 5 is arranged to move in synchronism with the reversing gear and for this purpose the cross head 9 to. which the piston rod 8 of the main motor is connected is also connected by reach rod 36 to a pivoted member 37, one end of which has a pin and slot connection with the rod 36 and the other end of which carries a semicircular rack 38 engaging a pinion connected to one of the rotary'members of the valvular mechanism 5. As the reversing gear and cross head 9 move, the' position motive fluid is exhausted from both ends ofthe cylinder through the pipes 11 and 12 and also from the pipe 35, thereby permitting the spring 34 to move the piston 32 back to its normal position which in turn actuates ,valve 3 and disconnects the pipe 19 to the lock 2 from the exhaust port 29 and connects said pipe to the steam supply pipe 28, thereby permitting pressure to the lock and locking the piston rod 8 in the position to which it has been moved.

From the above description it will be observed that when the valvular mechanism 5 is operated, fluid pressure is admitted to the motor 4 to actuate the valve 3 to' exhaust steam pressure from the lock 2 to unlock the reversing gear and simultaneously or slightly subsequent to this action pressure is admitted to one end ofthe cylinder 1 to actuate the reversing gear. As the reversing gear moves the valvular mechanism 5 is actuated synchronously therewith and is automatically returned to neutral position, in which position motive fluid is exhausted from both ends of the power motor 1 and from both ends of the power motor 4, thereby automatically stopping the reversing mechanism and looking it in position. The lock 2 is maintained in looking condition irrespective of the condition of the motive fluid-supply to the valvular mechanism 5. Such-supply may be entirely cut 01? and still the locking means will be maintained in lockin condition as long as steam is maintaine in the .locornotive boiler to which the pipe 28 is connected. Consequently, when a locomot1ve 1s left in a round-house or terminal yard its reversing gear will be automatically locked in position as long as steam pressure is maintained in the boiler irrespective ,of the condition of the fluid pressure supply in the fluid pressure reservoirs of the air brake system. 4

The valvular mechanism 5 for controlling the admission and release of motive fluid to and from theends of the cylinder 1 and to and from the cylinder 31 controlling the lock 3 is of the rotary type, as illustrated in Figs. 3 to 13 inclusive. It comprises a valve seat 40,. shown in Figs. 4, 8 and 13,

with which cooperates a main rotary member 41 having a hub 42 to which is connected a spur gear 43 meshingwith therack 38 carried by the pivoted member 37. Cooperating with the rotary member 41 is a gradu ating rotary 44 having a hollow, stem 45 to which is connected a spur gear""46 meshing with a rack 47 carried by a pivoted controlling lever 48. p

The valve seat 40 as shown in detail in Fig. 8 is provided With a plurality of concentric annular recesses 50, 51 and 52, each of which isc'onnected with one of the valve seat ports. The valve seat is provided with three ports, as follows: A port 53 connecting with the groove 50 and to which is connected the pipe 12 leading to the right-hand end of cylinder 1; a port 55 communicating with the groove 52 and connected to the pipe leading to the left-hand' end. of the' cylinder 4. The valve seat is provided with a central bore 56 through which extend the hollow hubs of the main and graduating rotaries; The inside of the bore 56 is-provided with a recess 57 shown in Fig. 13 and in dotted lines in Fig. 8, which recess communicates with an exhaust opening 58, as shown in Fig. 13. The hub of the main rotary has a port communicating with the recess 57 and the exhaust opening 58, whereby a passage is opened to atmosphere, as will be hereinafter described.

The main rotary-41 is illustrated in detail in Figs. -7 and 13. Its surface which coiiperates'with the valve seat is provided with a plurality of concentric'annular recesses 60, 61 and 62 which register with the corresponding recesses 50, 51 and 52 in the valve seat. The opposite side of the rotary has three bearingsurfaces 63, 64 and 65 and a hub bearin surface 66. The remainder of this face 0 the'rotary is recessed so as to provide'a cavity in which fluid pressure may be maintained. This recessed or depressed portion of the face of the rotary will be designated generally by the reference numeral 67. Themain rotary has fire ports, as follows: a port 68 in the bearing surface 63 extending through the rotary and communieating with the annular recess 61 on the opposite side thereof which in turn communicates with the recess 51 in the valve seat and through its. port 54 to the left-hand end of the cylinder 1; a port'69 in the bearing surface 64extending through the rotary and communicating with the annular recess 60 on the opposite face of the rotary which in.- turn communicates with the recess on the valve seat and through its port 53 with the pipe 12 to the righthand end ofthe cylinderl; a port 70 in the bearing surface 65 communicating through a cored-out passage '71extending through the body of the rotary side ofthe rotary which registers with the 1 recess'52 in the valve seat'which in turn has a port connected to the pipe 35 leading to the cylinder 4 which controls the valve .mechanism for the lock.

The graduating rotary 44 shown in Figs. 4., 6 and 13'has three arms 75, 76 and 77 [which coiiperate with the main rotary as follows: The arm 75 works on bearing surface 63, the arm 76 on bearing surface 64 .and the arm 77 on bearing surface 65.

The arm 75 has an opening 78 therein communicating through the cored-out passage 79 with the central boreor opening 80 in i i an r the hub of the graduating rotary. The openaccordingly, when the opening 78 registers with the port 68 which is in communication with the left-hand end of the cylinder, the pressure in this end of the cylinder is exhausted to atmosphere. The arm 75 is made relatively narrow so that when the graduating rotary is moved to a predetermined extent the port 68 in the main rotary is uncovered and it communicates with the chamber 81 formed by the depressed portion 67 of the main rotary and the casing 82 of the valvular mechanism, as shown in Fig.

I 4'. The fact that the graduatinn- "w r h three arms instead of being cylindrical permits the'fluid pressure in the chamber 81 to communicate with the depressed surface of the main rotary and the three arms tend to divide the chamber into three portions. For the purpose of having these portions communicate with each other, the arms may be recessed, asindicated at 83,'in Fig. 13. It

will be noted that the main rotary 41 is maintained in engagement with the valve seat by fluid pressure in the chamber 81 and that the graduating rotary is also maintained in engagement with the main rotary by fluid pressure. In addition, these ports are biased into engagement by a spring 84 illustrated in Fig. The arm 76 of the rotary is provided with an opening 85 communicating through a cored-out passage -86 with the central opening 80 in the hub of the rotary. When the opening 85 registers with the port 69 in the main rotary which communicates with the right-hand end of the I power cylinder 1, fluid pressure from this end of the cylinder is exhausted to atmosphere.

The arm 77 is provided with an irregular .shaped recess 87 whichcoiiperates with the ports 70 and 72. in ,the'bearing surface of the main rotary-for the purpose of controlling theiadmission and-* ifelease of fluid pressure "tofthe locking meang'j flas -will be hereinafter-described. 1

'The valvi'llar mechanism has five functional positions, as follows:

'1. Neutral position.

This position is shown in Fig. '9. The opening 78 in the arm 75. of the graduating -rotary registers with the port 68 in the main rotary and the opening 85 in the arm 76 communicates with the port 69 in the main rotary, and hence both ends of the cylinder 1 are exhausted. The recess 87 in the arm 77 of the graduating rotary registers with the port in the main rotary which in turn communicates throughthe passage 71, the recess 57 and port 58 with the atmosphere. The recess 87 also registers with the port 72 communicating. through the passage 73 and the annular recesses 62 80 communicates with the atmosphere in'locking position.

and 52 with the port 55 to the cylinder controlling the steam valve mechanism for the lock. The .cvlinder a is accordingly exhausted to atmosphere, allowing the piston 32 and the valve mechanism 3 to be main tained in the position shown, thereby admitting steam to the lock 2 which is maintained 2. Look 'releasing position. This position is shown in Fig. 10, and is assumed by movin the graduating rotary slightly-contra-cloc wise from the" position shown in Fig. 9.- In this position the recess 87 in the arm 77 has passed be ond the port 70 communicating with the at osphere and said portv is accordingly blanked. At the same time the left-hand edge-of therecess 87 has passed slightly beyond the edge of the bearing surface 65 on themain rotary and therefore communicates with the chamber formed by the depressed portion of the main rotary andthe valve' casing, in which chamber motive fluid is maintained under pressure. The recess 87 still communicates with the port'72 connected to the cylinder 31 controlling the pressure to the lock and accordingly motive fluid passes through the recess 86 to the cylinder 4, moving the piston 32 to the right, thereby shutting 0a stca'm'to the lock 2 and exhausting the presthe valve reversing gear.

sure in the lockto atmos hereto unlock the left-hand edge of arm -76' has passed slightly beyond the edge of the .port 69 in the main rotary so asto' slightly uncover said port, thereby putting it in communication with the .chamber in which motive fluid is maintained. The movement of the graduating rotary is, of. course, continuous and, as it moves farther, the port 69 is uncovered further, thereby admitting fluid pressure to the right hand'end of the cylinder for moving the piston '7 to the left to actuate the reversinggear. In this position of thevalvular mechanism the opening 78 in the arm-75 continues in communication with'the port 68- and maintains the left-hand end of the cylinder 1 in communicationwith the atmosphere.

Operating position.

In this position, which 'is illustrated in Fig. 11, the graduating rotary has been moved still farther in a contra-clockwise direction from the position'shown in Fig.

'10. communication with the pressure chamber The recess 87 in the arm- 77 is in full formed by the depressed portion of the main rotaryand the valvular casing and is also in full communication with the port 72 connected to the cylinder 4 controlling the locking means, so i that fluid pressure is maintained in the cylinder 4, thereby keeping the piston at the right-hand end of the t the same time cylinder and maintaining the valve mechanism 3 in such position as to connect the cyllnder of the lock 2 with atmosphere. The

valve reversing mechanism is thus main-' tained unlocked. In this position, portfl69 is fully uncovered and motive fluid at full pressure is admitted tothe right-hand end of the cylinder to actuate the reversing mechanism. The opening 78 in the arm still registers with the port 68 and connects the lefthand endof the cylinder 1, with at-" mosphere.

Look releasing position. (No. 2.)

This'position, shown inFig. 12, is the reverse of the position shown in Fig. 10. The graduating rotary has been moved slightly clockwise from the osition shown in Fig. 9. The exhaust port 0 in the main rotary has been blanked and the right-hand edge of recess 87 has moved slightly beyond the edge'of the bearing surface 65 on the main rotary, thereby causin said-recess to communicate with the cham er formed by the depressed portion of the main rotary and the valvular casing.

the port 72 to the cylinder 4:, whereby pis- This admits motive fluid to the recess 87 and through ton 32 is moved to the right and the lock munication with the port 69, and thus maintainstheright-handend of the cylinder.1

in co'mmunication with the atmosphere.

5.-0pe'r 'eting position. (No. 2.) This position is not shownbut is the res'ition the port 68 is fu y uncovered, the port' 69 is still maintained in communication with the atmosphere and the recess 87 is maintained in communication with the motive. fluid supply chamber and with the port 72leading to the cylinder 4..

verse of thatshown in Fi 11. In such polit It will be noted thatthevarious commu-' nications established by the above described positions of the valve members are not disturbed by the relative position of the main rotary and the valve seat because the communicating ports between these two mem- Consequently any passage involving a communication between the main rotary and the valve seat can be established irrespective of the relative position of these members.

here open into annular registering recesses.

, The movement of the graduating rotary relative to the main rotary causes the functional operations ofthe valvular mechanism to be performed. The graduaning rotary is,

as hereinbefore described, connected to the gear. 46 meshing with a rack 47 operated by a controlling lever 48. This lever-has a handle 90 and a latch 91 controlling a pawl 92 engaging a semi-circular rack 93 fixed to the valve casing or any other suitable support. -By unlocking the latch 91 and mov- J ing the handle 90, the gear 46 is-rotated to actuate the graduating rotary. The gear ratio is such that a' slight movement of the handle 90 causes a relatively large movement of the gear 46, as a consequence of which fine graduations in movement of the valvular mechanism maybe obtained. This is im' portant because it enables the engineer to set the valve reversing mechanism in any' desired ;position' and at the same time the mechanism may be'moved to the limit of its of the. controlling handle.

The gear46 has a pin 94 projecting therefrom into a recess 95 in the gear 43 connected to the main rotary. The two gears 46 and 43 therefore have only a limited relative movement. When the handle 90 is moved to actuate the gear 46, the gear is rotated until the pin94strikes the end of the slot 95, whereupon further movement of the handleois prevented. This movement,

movement without an extensive movement however, moves the graduatingrotary sufliciently to release the fluid pressurelockQ and admit fluid pressure to one end of the cylinder. Piston 7 accordingly moves and actuates the reversing gear which carries the reach rod 36'with it and actuates the pivoted member 37 carrying .the rack 38.

' meshing with the gear 43 connected to the around, thereby movement of the handle 90 to any desired main rotary. The gear 43 thus moves in the same direction as the gear 46 was moved and causes the slot '95 to move farther rmitting the handle 90 to befurth erunovefl. In practice, the operation is contin'uous because, as soon as the handle 90 is moved, the reversing mechanism starts to move .and'the gear 43 continues to rotate', thus permitting further position.

When the engineer desiresto operate the reversing gear he simply moves the handle 90 in the required direction, the first porthe reversing tion of the movement starting gear and rotating the gear 43 which permits further movement of the handle 90 to a position corresponding to the position. to which he desires to move the reversing gear. When the handle 90 is stopped atthe'dmired point, it is automatically latched in position and the gear 46 is held stationary. The

valve reversing I mechanism continues to move, carrying with it the gear 43 attached to 'them'am rotary until the main rotary occupies the position relative to the graduatmg rotary corresponding to neutralposition, in which position both ends of the -the appended claims.

power cylinder are exhausted as well s the cylinder 4 and the reversing gear is automatically stopped and locked in position.

It will thus be seen that by reason of the pin and slot connection between the gears 46 nd 43the relativepositions of the main and graduating rotaries cannot be changed beyond certain limits. The main rotary can, however, be moved to any position relative to the-valve seat without afl'ecting the operation of the valvular mechanism. Consequently the ratio between the rack 47 carried by the operating lever and the gear 46 and the gear 43,may be made such, if desired, that the gear 46 is rotated one or more times in moving the valve reversing mechanism from one position to the other. This gives a very finely" graduated control of the valve reversing mechanism, as will be readily apparent...

It is to be understood that the mechanism shown is for purposes of illustration only a and that other structures may be devised prising a fluid pressure motor, a valve re-' versing rod operated thereby, a fluid pressure operated lock for locking said rod, a

fluid pressure operated means for'contro1- ling the flow of motive fluid to and from said lock, valvular mechanism for controlling motive fluid to and from said motor and said fluid pressure controlling means, and independent motive fluid supply connections to said: valvular mechanism and to said fluid pressure controlling means.

3. A powerreverse gear comprising afluid pressure motor, a reversing rod' operated thereby, a fluid pressure lock for locking said rod, fluid pressure operatedmeans for controlling the motive fluid to and from said lock, said means being normally biased to keep the lock applied, and valvular mecha: nism for separately controlling the motive fluid to and from said motor and to and from said fluid pressure controlling means.

4. A locomotive valve reverse gear com prising a fluid pressure motor, a reversing rod operated thereby, a fluid pressure applied lock for lockin said rod,- fluid pressure operated means or controlling the flow of motive fluid to and from said lock, said means being normally biased to admit motive fluid to keep the lock applied, valvular mechanism for controlling ,the motive fluid to and from said motor and said fluid pressure controlling means, and independent mo tive fluid supply connections to said valvular mechanism and to said fluid pressure controlling means.

- 5. Apowerreverse gear comprising a fluid pressure motor, a reversing rod operated motive fluidfrom both sides of the motor j and the fluid pressure controlling means and when operated to'admit motive fluid .to one side ofthe motor and to the fluid pressure controlling'means to unlock the lock.

6. A valve reversing mechanisrnfor steam engines comprising a fluid pressure motor, a reversing rod operated thereby, a fluid pressureapplied lock for locking said rod,

fluid pressure operated means for controlling the flow of motive fluid to and from said lock, valvular mechanism for controlling the motive fluid to and from said motor and said fluid pressure controlling means, said mechanism being arranged to normally exhaust motive fluid from both sides of the motor and from the fluid pressure controlling means and when operated to admit motive fluid to one side of. the motor and to the fluid pressure controlling means, and independent motive fluid supply connections to said valvular mechanism and to said fluid pressure controlling means.

7 A power reverse gear comprising a fluid pressure motor, a reversing rod operated thereby, a fluid pressure applied lock for locking said rod, fluid pressure. operated means for controlling the flow of motive fluid to and from said lock, said means being normally biased to admit motive fluid to the lock, and valvular mechanism for separately controlling the motive fluid to and from said motor and to and from said fluid pressure controlling means, said mechanism,

being arranged to normally exhaust both sides of the motor and the fluid pressure controlling means sothat, the motor is inactive and the lock applied and when oper ated to admit motive fluid to one side of the motor and to the fluid pressure controlling means to exhaust motive fluid from the lock.

8. A power valve reverse gear forsteam engines comprising a fluid pressurernotor, a reversing rod operated thereby, a fluid pres- 4 sure applied lock for lockingsaid rod, fluid pressure operated means for controlling the flow of motive fluid to and from said lock,

said means being-normally'biased to admit motive fluid to keep the lock applied, valvular mechanism for controlling the motive fluid to and from said motor and said fluid pressure controlling means, said mechanism being arranged to normally exhaust both sides of the motor and the fluid pressure controlling means to keep the motor inactive and the lock appliedand when operated to admit motive fluid to one side of the motor and to the fluid pressure controlling means to unlock the lock and actuate the motor, and independent fluid supply connections to said valvular mechanism and to said fluid pressure controlling means.

9. .A power reverse gear having a fluid pressure motor, a reversing rod operated thereby, a fluid pressure applied friction lock for locking the rod, a fluid pressure operated means for controlling the motive fluid to and from the lock, said means being normally biased to admit motive fluid to the lock to keep it applied, and valvular mechanism for separately controlling motive fluid to and from the motor and to and from the fluid pressure controlling means, said mechanism being arranged to normally exhaust both sides of the motor and the fluidpressure controlling means and when operated to admit motive fluid to one side of the motor and to the fluid pressure controlling means to unlock the lock and actuate the motor.

10. A poWer reverse gear comprlsing a fluid pressure motor, a reversing rod operated thereby, a fluid pressure lock for locking said rod, fluid pressure operated means ated thereby, a fluid pressure applied lock for locking said rod, fluid pressure operated means for controlling the motive fluid to and from said lock, said means being normally biased to admit motive fluid to the lock, valvular mechanism for separately controlling the motive fluid to and from said motor and to and from said fluid pressure controlling means, and connections between the reversing rod and the valvular mechanism for automatically returning the mechanism to neutral after the rod has moved the required extent.

12. A power reverse gear for steam engines comp-rising a fluid pressure motor, a reversing rod operated thereby, a fluid pressure applied lock for locking said rod, fluid pressure operated means for controlling the motive fluid to and from said lock, said means being arranged to normally admit fluid pressure motor, a reversing rod operated thereby, a fluid pressure applied lock for locking said rod, fluid pressureo erated means for controlling the motive uid to and from said-lock, said means being nor-- mally biased to admit motive fluid to the lock to keep it applied, valvular mechanism for separately controlling the motive fluid to and from said motor and to and from said fluid pressure controlling means, said mechanism being arranged to normally exhaust both sides of the motor and the controlling means, and connections between the reversing rod and the valvular mechanism for automatically returning the mechanism to neutral after the rod has moved the required extent.

14. A power reverse gear for steam engines comprising a fluid pressure motor, a reversing rod operated thereby, a fluid pressure applied lockfor locking said rod, fluid pressure operated means for controlling the motive fluid to and from said lock, said means being normally biased to admit motive fluid to keep the lock applied, valvular mechanism for controlling the motive fluid to and from said motor and saidfluid pres sure, controlling means, said mechanism being arranged to normally exhaust both sides of the motor and the controlling means and when operated to admit motive fluid'to one side of the motor and the controlling means, independent motive fluid supply connections to said valvular mechanism and toi said fluid pressure controlling means,-and connections between the valvular mechanism and-thereversing rod to automatically return the mechanism to neutral position aftor-the rod has moved the required extent;

' 15, A power reverse gear having a fluid pressure motor, a reversing rod operated thereby, a fluid pressure lock for locking said lrod, .a valve for controlling the motive I fluidfto and from said look, a fluid pressure to and from both of said fluid 60 motor for operating said valve, and valvular mechanism for" controlling the motive fluid pressure motors;

fluid pressure motor,

I a reversing rod operated thereby, a flllld pressure applied lock for locking. said rod, a valve for controlling j fluid pressure motor,

fluid pressure motor for valve, said motor. being normally biased to position the valve to admit motive fluid to.

16, A .power reverse gear comprising' w fluid pressure'motor for operating saidvalve, said motor being normally biasedto cause the valve to admit motive fluid to keep the lock applied, and valvular mechanism for controlling the motive fl uid to and from both of said fluid pressure motors.

17. A power reverse gear for steam engines comprising a fluid pressure motor, a reversing rod operated thereby, a steam pressure applied lock for locking said rod, a valve for controlling the steam ,to and from said look, a fluidpressure motor for operating-said valve, said motor being normally biased to position, the valve to admit steam to keep the lock applied, and valvular mechanism for controlling the motive fluid to and from both of said fluid pressure motors. a

18. A power reverse gear comprising a fluid pressure motor, 'a reversing rod operated thereby, a fluid pressure applied lock for locking the motive fluid to and from said lock, :1. fluid pressure motor for operating said valve, said motor being normally biased to position the valve to admit fluid pressure to keep the lock applied, and valvular mechanism for controlling the motive fluid to and from both of said motors, said mechanism being arranged to normally exhaust motive fluid from both sides of the reversing rod motor and from the valve controlling motor and when operated to admit motive fluid to one side of the reversing rod motor and to the valve controlling motor.

19. A power reverse gear for steam engines comprising a fluid pressure motor, a reversing rod operated thereby, a steam pressure applied lock for locking said rod, avalve for controlling the steam to and from saidlock, a fluid pressure motor for operating said valve, said motor being normally biased to admit steam to apply the lock, and valvular mechanism for controlto admit motive fluid to one side of the re versing rod motor and to' the valve controlling motor toiunlock the'lock and move the rod. w r 20. A power reverse gear comprising a a reversing rod operated thereby,

the motive fluid to and from said lock, a operating said keep the lock applied, valvular mechanism for controlling the motive fiuidto and from both of said motors, and connections be A asfluid pressure applied lock .for locking said rod, a valve for controlling moved the required extent.

2L A power reverse gear for steam englues-comprising a fluid pressure motor, a

reversing rod operated" thereby, a steam pressure applied lock for-locking said rod, a valve for controlling the steam to and from said lock, a fluid pressure motor for operating said valve, said motor being normally biased to position the valve to admit steam to apply the lock, valvular mechanism for controlling the motive fluid to and from both of said motors, said mechanism being arranged to normally exhaust both sides of the rod operating-motor and to exhaust the valve controlling motor, and connections between the valvular mechanism and the reversing rod to automatically return the mechanism to neutral after the rod has moved the required extent.

22. A power reverse gear comprising a fluid pressure motor, a reversing rod operated thereby, a fluid pressure lock for lock ing said rod, rotary valvular mechanism for controlling the motive fluid for actuating the motor and the lock, and connections between thereversin'g rod and the valvular mechanism including a pivoted member having a rack meshing with a gear connected to one of the rotary elements of the valvular mechanism, and a reach rod having a pin and slot connection with the pivoted memher for causing the rotary valvular mechanism to move in synchronism with the reversing rod, whereby the mechanism is automatically returned to neutral whenfthe rod has moved the required extent.

23. A power reverse gear comprising a fluid pressure motor, a reversing rod operated thereby, a fluid pressure lock'for looking the rod, valvular mechanism for controlling the motive fluid for actuating the motor and the lock, said valvular mechanism having a valve seat and a main rotary member provided with cooperating annular recesses whereby fluid pressure connections between the same are maintained in all relative positions' of the members and" a graduating rotary member. arranged to be moved relative to the main rotary to vary the fluid pressure connections therewith, and connections between the reversing .rod and the graduating rotary for moving said graduating rotary in synchronism with the reversing rod to automatically return the graduating rotary to its normal position relative to the main rotary after the. reversing rod has moved the required extent.

lin testimony whereof, I have hereunto set my hand JACOB RUSH SNYDER. Witnesses:

L. G. SGHANTZ, W. 'l. HOLMAN. 

